3 * This site's [[entry-level explanation of the differences between Scheme, OCaml, and Haskell|rosetta1]]

4 * A bit about comments and brackets is available [[here|/rosetta2]]; and then more details about how to do some OCaml-ish and Haskell-ish things in Scheme, and how to get Scheme-ish continuations in OCaml, are [[here|/rosetta3]]

38 * [Racket Guide](http://docs.racket-lang.org/guide/index.html) starts with a tutorial, then describes the rest of the Racket language. Intended for programmers who are new to (at least some part of) Racket. If you are new to programming, you should instead start with one of the textbooks listed above. Describes parts of the Racket language that go beyond the learning-oriented fragments of HtDP.

39 * [Racket Reference](http://docs.racket-lang.org/reference/index.html) defines the core Racket language and its most prominent libraries. Less friendly than Racket Guide, but more precise and complete.

159 Scheme is a very small language which is based on Lisp, the oldest of functional programming languages. Scheme's main advantages are elegance (the entire language can be built on top of a handful of primitive list manipulating operations), and the enormous corpus of educational material which has been created for it. As such, Scheme is the perfect place to start learning the techniques of functional abstraction. If you decide to study Scheme, you should make sure you that your path through the available material brings you into contact with all of the following (in no particular order):

169 An excellent place to start is the book: Structure and Interpretation of Computer Programs (considered by some the "bible" of functional programming, which may give a false implication as to its breadth, despite it being a very good book). There are also countless other great books and websites which have been published to answer questions on how to learn Lisp, why to learn Lisp, etc., so searching the web will most certainly be worth your time.